Double pump with one inlet and two outlets

Abstract

The utility model discloses a double pump with one inlet and two outlets, which comprises a first pump main body and a second pump main body, a transmission shaft of the first pump main body and a transmission shaft of the second pump main body are fixed together through a coupling sleeve, and a cover plate is fixed between a rear end cover of the first pump main body and a rear end cover of the second pump main body. An oil cavity is defined by the cover plate, the impeller of the first pump body, the impeller of the second pump body and the pump shell, and an oil inlet is formed in the position, at the oil cavity, of the pump shell. Compared with the prior art, the two rear end covers are fixed together through the cover plate, so that a new end cover is formed, the two pump main bodies share one end cover, the length of the double pump is effectively reduced, the weight is reduced, and the whole structure becomes compact. And secondly, only one oil inlet is arranged, so that pipelines are reduced, and the system pipeline design can be effectively simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a one-inlet and two-outlet double pump. Background Art

[0002] The plunger pump is an important energy conversion element in the high-pressure hydraulic system. It relies on the reciprocating motion of the plunger in the plunger-slipper assembly (including the plunger and the slipper, with a ball and a ball socket at the connection of the plunger and the slipper for ball joint connection) in the cylinder to change the volume of the hydraulic oil in the closed chamber, realize the suction and extrusion of the hydraulic oil in the hydraulic circuit, and convert the mechanical energy provided by the motor into hydraulic energy. In reality, for the convenience of using the pump and the limitation of space installation, two pumps are often required to be used together. Refer to the attached Figure 1-2 In the existing scheme, after the two pumps are connected in series, the two pumps are still independent pumps. The two pumps are connected together through a transition plate and a coupling. The torque output by the motor is transmitted to the rear transmission shaft through the front transmission shaft and the coupling. Since the two pumps are independent pumps, it has the following disadvantages:

[0003] 1. It is a complete combination of two pumps and is heavy. The duplex pump is longer in the length direction of the transmission shaft.

[0004] 2. The duplex pump has two oil inlets and two oil outlets, which are far apart, making the oil circuit layout difficult and the piping complex. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] Based on this, the utility model proposes a double pump with one inlet and two outlets to solve at least one of the above technical problems.

[0007] (II) Technical solution

[0008] In order to overcome the above-mentioned problems or at least partially solve the above-mentioned problems, the utility model provides a one-inlet and two-outlet double pump, comprising a first pump body and a second pump body, wherein a transmission shaft of the first pump body and a transmission shaft of the second pump body are fixed together by a coupling sleeve, a cover plate is fixed between the rear end cover of the first pump body and the rear end cover of the second pump body, the cover plate, the impeller of the first pump body, the impeller of the second pump body and the pump casing together form an oil chamber, and the pump casing is provided with an oil inlet at the oil chamber.

[0009] Preferably, a first connection panel is provided between the two rear end covers, and the oil outlet of the first pump body and the oil outlet of the second pump body are both provided on the first connection panel.

[0010] Preferably, the first connection panel is provided with a plurality of first screw holes.

[0011] Preferably, there are two first connection panels, and the two first connection panels are respectively arranged on two sides of the pump housing.

[0012] Preferably, the coupling sleeve and the transmission shaft are spline-connected.

[0013] Preferably, the end of the coupling sleeve extends to the impeller.

[0014] Preferably, the cover plate and the rear end cover are fixed by bolts.

[0015] Preferably, a sealing ring is provided between the cover plate and the rear end cover.

[0016] Preferably, two partitions are provided on the cover plate, the partitions are in contact with the outer side of the impeller, and the oil chamber is provided between the two partitions.

[0017] Preferably, a second connection panel is provided between the two rear end covers, the oil inlet is arranged on the second connection panel, and the second connection panel is provided with a second screw hole at the oil inlet.

[0018] (III) Beneficial effects

[0019] The one-inlet and two-outlet double pump of the utility model has the following advantages:

[0020] The utility model fixes the two rear end covers together through a cover plate to form a new end cover. The two pump bodies share one end cover, which effectively reduces the length of the double pump, reduces the weight, and makes the overall structure compact. Secondly, only one oil inlet is set, which reduces the pipeline and can effectively simplify the system pipeline design. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0022] Figure 1 It is a structural schematic diagram of an existing double pump;

[0023] Figure 2 It is a cross-sectional schematic diagram of an existing double pump;

[0024] Figure 3 It is a schematic diagram of the structure of the utility model;

[0025] Figure 4 for Figure 3 Bottom view of

[0026] Figure 5 It is a cross-sectional schematic diagram of the utility model.

[0027] Description of reference numerals:

[0028] 100. First pump body, 200. Second pump body, 1. Transmission shaft, 2. Coupling sleeve, 3. Rear end cover, 4. Cover plate, 5. Impeller, 6. Pump casing, 7. Oil chamber, 8. Oil inlet, 9. First connecting panel, 10. Oil outlet, 11. First screw hole, 12. Bolt, 13. Sealing ring, 14. Partition plate, 15. Second connecting panel, 16. Second screw hole, 17. Transition plate, 18. Coupling. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0030] See attached Figure 5 , this embodiment provides a double pump with one inlet and two outlets, including a first pump body 100 and a second pump body 200, the transmission shaft 1 of the first pump body 100 and the transmission shaft 1 of the second pump body 200 are fixed together by a coupling sleeve 2, a cover plate 4 is fixed between the rear end cover 3 of the first pump body 100 and the rear end cover 3 of the second pump body 200, the cover plate 4, the impeller 5 of the first pump body 100, the impeller 5 of the second pump body 200 and the pump shell 6 enclose an oil chamber 7, and the pump shell 6 is provided with an oil inlet 8 at the oil chamber 7. Compared with an independent plunger pump, the rear end cover 3 at the impeller 5 of the double pump of the utility model will be removed, and then the two rear end covers 3 are fixed together by the cover plate 4 to form a new end cover, which is equivalent to changing the two rear end covers 3 of the original double pump into one rear end cover 3. This setting effectively reduces the length of the double pump, reduces the weight, and makes the overall structure compact. Secondly, only one oil inlet 8 is set, which reduces the pipeline and can effectively simplify the system pipeline design.

[0031] As another embodiment of the present invention: Figure 3 A first connection panel 9 is provided between the two rear end covers 3, and the oil outlet 10 of the first pump body 100 and the oil outlet 10 of the second pump body 200 are both provided on the first connection panel 9. The two oil outlets 10 are provided on one panel, which is convenient for uniformly arranging pipelines. Furthermore, the first connection panel 9 can be connected through the panel interface, and then an oil outlet pipeline can be connected from the panel interface, that is, the two oil outlets 10 only need to be connected to one oil outlet pipeline. This structural design is conducive to the layout of the oil circuit.

[0032] As another embodiment of the present invention: a plurality of first screw holes 11 are provided on the first connection panel 9 to fix the panel interface to the first connection panel 9. Specifically, the first screw holes 11 are evenly distributed along the outer periphery of the oil outlet 10.

[0033] As another embodiment of the present invention, there are two first connection panels 9, and the two first connection panels 9 are respectively arranged on both sides of the pump housing 6. If the oil outlet 10 on the current first connection panel 9 is not convenient for connecting the pipeline, the oil outlet 10 on the first connection panel 9 on the other side of the double pump can be used, and the oil circuit can be arranged conveniently through this structure.

[0034] An implementation method of fixing the coupling sleeve 2 to the transmission shaft 1: the coupling sleeve 2 and the transmission shaft 1 are spline-connected.

[0035] As another embodiment of the present invention, the end of the coupling sleeve 2 extends to the impeller 5. This arrangement can increase the contact area between the coupling sleeve 2 and the transmission shaft 1, which helps to make the connection between the transmission shaft 1 and the coupling sleeve 2 more secure.

[0036] An implementation manner of fixing the cover plate 4 to the rear end cover 3 : the cover plate 4 and the rear end cover 3 are fixed by bolts 12 .

[0037] As another embodiment of the present invention: a sealing ring 13 is provided between the cover plate 4 and the rear end cover 3 to improve the sealing performance of the oil chamber 7 .

[0038] As another embodiment of the utility model: two partitions 14 are provided on the cover plate 4, the partitions 14 are in contact with the outer side of the impeller 5, the oil chamber 7 is provided between the two partitions 14, a chamber is formed between the rear end cover 3 and the cover plate 4, and the impeller 5 is located in the chamber.

[0039] As another embodiment of the present invention: Figure 4 A second connection panel 15 is provided between the two rear end covers 3, the oil inlet 8 is provided on the second connection panel 15, and the second connection panel 15 is provided with a second screw hole 16 at the oil inlet 8. The oil inlet pipe is conveniently fixed to the second connection panel 15 through the second screw hole 16.

[0040] The utility model fixes the two rear end covers 3 together through the cover plate 4 to form a new end cover. The two pump bodies share one end cover, which effectively reduces the length of the double pump, reduces the weight, and makes the overall structure compact. Secondly, only one oil inlet 8 is provided, which reduces the pipeline and can effectively simplify the system pipeline design.

[0041] Finally, the method of the utility model is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0042] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A double pump with one inlet and two outlets, characterized in that: It includes a first pump body and a second pump body, the transmission shaft of the first pump body and the transmission shaft of the second pump body are fixed together by a connecting sleeve, a cover plate is fixed between the rear end cover of the first pump body and the rear end cover of the second pump body, the cover plate, the impeller of the first pump body, the impeller of the second pump body and the pump casing form an oil cavity, and the pump casing is provided with an oil inlet at the oil cavity.

2. The one-inlet-two-outlet double pump according to claim 1, characterized in that: A first connection panel is provided between the two rear end covers, and the oil outlet of the first pump body and the oil outlet of the second pump body are both provided on the first connection panel.

3. The one-inlet-two-outlet double pump according to claim 2, characterized in that: The first connection panel is provided with a plurality of first screw holes.

4. The one-inlet-two-outlet double pump according to claim 3, characterized in that: There are two first connection panels, and the two first connection panels are respectively arranged on two sides of the pump housing.

5. The one-inlet-two-outlet double pump according to claim 1, characterized in that: The coupling sleeve and the transmission shaft are spline-connected.

6. The one-inlet-two-outlet double pump according to claim 5, characterized in that: The end of the coupling sleeve extends to the impeller.

7. The one-inlet-two-outlet double pump according to claim 1, characterized in that: The cover plate is fixed to the rear end cover by bolts.

8. The one-inlet-two-outlet double pump according to claim 7, characterized in that: A sealing ring is arranged between the cover plate and the rear end cover.

9. The one-inlet-two-outlet double pump according to claim 8, characterized in that: The cover plate is provided with two partitions, the partitions are in contact with the outer side of the impeller, and the oil chamber is provided between the two partitions.

10. The one-inlet-two-outlet double pump according to claim 1, characterized in that: A second connection panel is provided between the two rear end covers, the oil inlet is arranged on the second connection panel, and the second connection panel is provided with a second screw hole at the oil inlet.

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